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RADIUS, short for Remote Authentication Dial-In User Service, is a remote server that provides authentication and accounting facilities to various network appliances. RADIUS authentication and accounting gives allows the ISP or network administrator the ability to manage PPP user access and accounting from one server throughout a large network. The MikroTik RouterOS has a RADIUS client that can authenticate for HotSpot, PPP, PPPoE, PPTP, L2TP, OVPN, and ISDN connections. The attributes received from the RADIUS server override the ones set in the default profile, but if some parameters are not received they are taken from the respective default profile.
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This sub-menu allows adding /remove and removing RADIUS clients.
| Note |
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The order of added items in this list is significant. |
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| Property | Description |
|---|---|
| accounting-backup (yes | no; Default: no) | Whether the configuration is for the backup RADIUS server |
| accounting-port (integer [1..65535]; Default: 1813) | RADIUS server port used for accounting |
| address (IPv4/IPv6 address; Default: 0.0.0.0) | IPv4 or IPv6 address of RADIUS server. The following formats are accepted: - ipv4 |
| authentication-port (integer [1..65535]; Default: 1812) | RADIUS server port used for authentication. |
| called-id (string; Default: ) | Value depends on Point-to-Point protocol: PPPoE - service name, PPTP - server's IP address, L2TP - server's IP address. |
| certificate (string; Default: ) | Certificate file to use for communicating with RADIUS Server with RadSec enabled. |
| comment (string; Default: ) | |
| disabled (yes | no; Default: no) | |
| domain (string; Default: ) | Microsoft Windows domain of client passed to RADIUS servers that require domain validation. |
| protocol (radsec | udp; Default: udp) | Specifies the protocol to use when communicating with the RADIUS Server. |
| realm (string; Default: ) | Explicitly stated realm (user domain), so the users do not have to provide proper ISP domain name in the user name. |
| secret (string; Default: ) | The shared secret used to access the RADIUS server. |
| service (ppp|login|hotspot|wireless|dhcp; Default: ) | Router services that will use this RADIUS server:
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| src-address (ipv4/ipv6 address; Default: 0.0.0.0) | Source IP/IPv6 address of the packets sent to the RADIUS server |
| timeout (time; Default: 100ms) | Timeout after which the request should be resent, for example, "/radius set timeout=300ms numbers=0" |
| Note |
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When the RADIUS server is authenticating the user with CHAP, MS-CHAPv1, MS-CHAPv2, it is not using a shared secret, the secret is used only in the authentication reply, and the router is verifying (RADIUS client) verifies it. So if you have the wrong shared secret, the RADIUS server will accept a request, but the router won't accept a the reply. You can see that with "/radius monitor" command, the "bad-replies" number should increase whenever somebody tries to connect. |
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| Warning |
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If RadSec is enabled, make sure your RADIUS Server is using "radsec" as the shared secret, otherwise, the RADIUS Server will not be able to decrypt data correctly (unprintable characters). With RadSec RouterOS forces the shared secret to "radsec" regardless of what has been set manually (RFC6614). For more details see - RFC6614. |
Example
To set up a RADIUS Client for HotSpot and PPP services that will authenticate against a RADIUS Server (10.0.0.3), you need to do the following:
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| Property | Description |
|---|---|
| accept (yes | no; Default: no) | Whether to accept the unsolicited messages |
| port (integer; Default: 1700) | The port number to listen for the requests on |
vrf (VRF name; default value: main) | Set VRF on which service is listening for incoming connections |
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